package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;


    //根据categoryId或菜品名称查询菜品
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //dish_1397844391040167938_1
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }

    /*public R<List<Dish>> list(Dish dish) {
        if (dish.getCategoryId() != null) {
            //构造查询条件
            LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
            lqw.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
            //添加条件，查询状态为1（起售状态）的菜品
            lqw.eq(Dish::getStatus, 1);
            //添加排序条件
            lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

            List<Dish> list = dishService.list(lqw);

            return R.success(list);
        }else{
            log.info(dish.getName());
            //byte[] bytes=name.getBytes("ISO-8859-1");
            LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
            lqw.like(Dish::getName, dish.getName());
            List<Dish> list = dishService.list(lqw);
            return R.success(list);
        }
    }*/

    /**
     *  新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {

        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("新增菜品成功");

    }

    /**
     * 分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        //添加条件构造器
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, queryWrapper);


        Page<DishDto> dtoPage = new Page<>();
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");

        List<Dish> records =pageInfo.getRecords();
        List<DishDto> dtoList = new ArrayList<>();

        records.forEach(dish -> {
            DishDto dto = new DishDto();
            BeanUtils.copyProperties(dish,dto);
            Category c = categoryService.getById(dish.getCategoryId());
            dto.setCategoryName(c.getName());
            dtoList.add(dto);
        });
        dtoPage.setRecords(dtoList);

        return R.success(dtoPage);

    }

    /**
     * 根据id查询菜品信息和对应口味
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto ){

        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }

    //修改菜品状态
    @PostMapping("/status/{status}")
    public R<String> updateStatus(@PathVariable Integer status , @RequestParam List<Long> ids){
        log.info("进行菜品状态修改");

        //创建条件生成器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);

        //获取修改的菜品集合
        List<Dish> dishes = dishService.list(queryWrapper);
        for (Dish dish : dishes) {
            dish.setStatus(status);
            dishService.updateById(dish);
        }

        return R.success("状态修改成功");
    }

    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){

        log.info("进行菜品状态删除");
        dishService.removeByIds(ids);

        return R.success("菜品删除完成");
    }
}
